In Photoshop you have your mockup with necessary filters and especially Mesh wrap applied to a Smart Object. Then you just replace the image inside the smart object and you get instant results. Having Mesh Wrap as live-filter on Embedded documents in AP, would be a game changer.

It's probably the one missing thing for me to be able to move over completely from Photoshop to Affinity Photo, since I work with mockups every day.